Digital Elevation Models (DEM) Establishment In Anshan City

People has paid close attention to DEM since 1950s and has widely used in surveying, civilian engineering, geology, mine engineering, landscape engineering, road design, control flood, agriculture, city building plan, military affairs engineering, flying instrument, and etc.City DEM established plays important action in many aspects. In this paper linking existed result and Anshan city present situation the author puts forward to utilizing big scale line draw map form DEM method and study feasibility of big scale DEM.First, integrating Anshan present situation the author analyze EDM date and obtain surface model according to DEM basic concept and feature, and put forward accurate mathematical model of EDM, and do analysis and comparison to existing DEM.Second, the author study emphatically quality control of EDM method producing, original date error process, model accurate evaluate and quality check. According to Anshan DLG feature the author analyze and judge true and false error and clear up true error.The end, the author discusses Anshan concrete application of city DEM and proves DEM effect in nationals economic construction.